Elevator Pit Waterproofing

1. Prepare the Area

• Remove all non-essential equipment from the elevator pit.
• If equipment cannot be removed, cover it securely with masking tape and plastic sheeting to protect it from overspray or cleaning materials.

2. Clean and Degrease the Surfaces

• Thoroughly clean the concrete surfaces to be treated.
• Use an appropriate degreaser to remove any oils, grime, or dirt.
• After degreasing, rinse the surfaces thoroughly to remove any remaining residues. Ensure the area is dry before applying HLQ-125.

3. Apply HLQ-125

• Use a low-pressure sprayer equipped with a 0.5 gallon-per-minute (gpm) spray tip for even application.

Application Process:

• First Coat: Apply a light mist to the surface to break surface tension and allow the product to penetrate effectively.
• Subsequent Coats: After the first coat is dry to the touch, apply additional coats back-to-back.
• Avoid excessive product rundown. Ensure the product does not run more than 2 inches after each application.
• Continue applying coats until the surface remains dark but not wet or shiny for more than 20 minutes.

4. Monitor the Pit

• After application, monitor the treated area for at least 4 hours to ensure proper absorption and performance.

5. Address Active Leaks or Cracks

• For any visible active leaks or cracks, apply an appropriate repair method:
  • Urethane foam for leaks.
  • Epoxy injection for structural cracks.

6. Repair Spalls and Voids

• Once all surfaces are waterproof, repair any spalls or voids in the concrete using standard repair mortar.

7. (Optional) Treat Cold Joints

• If necessary, treat cold joints by:
  • Cutting a square groove of 3/8″ x 3/8″.
  • Sealing the groove with hydraulic cement to prevent water infiltration.

8. Final Steps

• If desired, surfaces treated with HLQ-125 can be painted to improve light reflectance and aesthetics.